Mine is all rusty and leaking,would it be possable just to cut it just below the filler and replace the steel pipe with rubber,can anyone foresee any probs with this?

Hi,im Dan from Newcastle,I have a 1990 Scirocco scarla with a 2l bottom end with a big valve head,cam(cant remember what duration) and branch manifold,its looking a bit scruffy at the mo but hopfully will start getting it sorted this winter.Below is an old ish pic,just looks a bit scruffyer now :cry ...